Active Time
30-45 minutes
Total Project Time
30-45 minutes
Key Concepts
robotics, circuits
Photo of an assembled brush bot


Brushbots are a simple, fun type of robot that you can build out of arts and crafts materials. They are easy to build and you do not need any previous experience with robotics. You can build them yourself, build two robots with a friend and race them against each other, or even make them sumo wrestle! Go to the Materials section to see what parts you need to build a brushbot, and see the instructions for a step-by-step guide on how to build one.


Ben Finio, PhD, Science Buddies
This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.


  • Bristlebot Robotics Kit, available from our partner Home Science Tools. You will need these parts from the kit:
    • AA batteries (2)
    • 2xAA battery holder
    • 3 volt DC motor
    • Note: The kit includes enough parts to build two brushbots, or one brushbot and one Art Bot. It also contains parts for two bristlebots.
  • You will also need the following supplies (not included in the kit):
    • Scrub brush
    • Double-sided foam tape
    • Optional: Hot glue gun (adult supervision required)
    • Tape (any kind will work)
    • Cork
    • Small Phillips-head screwdriver
    • Scissors
    • Optional: Materials to decorate your robot (googly eyes, pipe cleaners, etcetera)

Disclaimer: Science Buddies participates in affiliate programs with Home Science Tools,, Carolina Biological, and Jameco Electronics. Proceeds from the affiliate programs help support Science Buddies, a 501(c)(3) public charity, and keep our resources free for everyone. Our top priority is student learning. If you have any comments (positive or negative) related to purchases you've made for science projects from recommendations on our site, please let us know. Write to us at


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Active Time
30-45 minutes
Total Project Time
30-45 minutes
Key Concepts
robotics, circuits
icon scientific method

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